Display device



Feb. 20, 1934. D. L. `lR'lMRosE l Y l 1,947,920

DISPLAY DEVICE Y Filed Aug. 19,"1933 Peienied Feb. zo, 1934 1,947,920

`UNITED STATES PATENTy OFFICE DISPLAY DEvrcE Donald L. Primrose, Baltimore, Md. Application August 19, 193s. serial No. 695,949

`12 claims. (0146-49) This invention relates yto display devices, and which like reference numerals indicate like parts in the form shown is also capable of use as a. throughout the several views, and referring ilrst toy and for other purposes, and in the main it to Fig. 1, 1 is a magnet concealed in and supembodies a structure or structures taking advanported in a suitable body 3, which body 3 is 5 tage of the principle that like poles of magnets here shown as having the general form or out- 00 repel while unlike poles attract. In the emline of a human figure, the said magnet and bodiments of the invention shown in the acbody being free to move vertically in suitablecompanying drawings, one of the magnets is guideways 4 4, which guideways are preferably capable of reciprocatingI movement, while the provided with upper and lower stops, the guideother is provided with means whereby it (the ways being supported on'standards 5-5, here second magnet) may be moved into or out of shown as having the form of the head and foot the magnetic field of the rst magnet. Thus of a bedstead. The standards 5-5 are sup- 4 in combination with the action of gravity the ported in any suitable way, and as here shown rst magnet is caused to reciprocate. In some they are carried by a casing 6, in which there forms of the invention the rst 'or reciprocatis a disk 7 supporting the secondmagnet 8. 70 ing magnet is concealed in a suitable body, such Preferably there are a plurality of said magnets as that of the figure of a human being or a doll, 8, here shown as four in number. 'Ihe -dlsk 7 while the second magnet is concealed in a is supported on a shaft 9, taking bearing in suitable casing, and any suitable means are the end walls of the casing 6, and provided with provided for moving the second magnet into any suitable means for imparting revolution 75 and out of the magnetic eld of the first magthereto, said means being here shown in the net.' 'I'here thereby imparted to the body or form of a crank 10.

- -fig'ure in which the first magnet is concealed a As here shown, thelike poles` of the magnets reciprocating motion without means apparent 1 and 8 are opposite each other and when the to the observer for effecting such movement, magnets is brought within the magneticfeld s0 and when placed on display ina show window, of the magnet 1 the effect is to repel the magit is calculated to attract attention. net 1 and cause it, with its supported body 3, to The inventive idea involved is capable of rerise in the guideways #-4, and when the magceiving a variety of mechanical expressions, net 8 passes out of the magnetic iield, the magsome of which for the purpose of illustrating net 1, with its supported body falls under the 35 the invention are shown in the accompanying action of gravity. It will be manifest to those drawing, but -it is toA be expressly understood skilled in the art that if the magnet 8 were `that such drawings are for the purpose of illusplaced above the magnet 1 with the unlike poles tration only and are not designed to define the opposite each other, the magnet 1 would be limitations of the invention, reference being had attracted toward the magnet 8 when the latter 90 to the appended claims for this purpose. is brought within the magnetic field of the mag- In said drawingnet 1 and when it passes out of. said field, the Fig. 1 is a vertical, longitudinal, medial secmagnet 1, with its supported body, would descend tion of a construction wherein a body with'a under the action of gravity, the principle of 40 magnet concealed therein is free to reciprocate operation beingthe ysame as in the case shown 05 in a vertical plane. in Fig. 1. By turning the crank 10 so as to Fig. 2 is a vertical cross' section on the line bring the magnets 8, one after the other, into p 2-2 of Fig; 1 looking in the direction of the the magnetic held-of the magnet 1, the latter arrows with its supported body, can be caused to move Fig. 3 is a vertical, longitudinal, medial section up and down without any means visible to the 1100 of a form of the invention wherein the reciproobserver for causing such movement, 'thus procable magnet is concealed in a cradle, andl ducing a `mystii'ying effect calculated to attract Fig. 4 is a vertical, transverse sectionon the the attention of the passer-by. Moreover, by `line 4 4 of Fig. 3, looking in the direction of giving the body 3 the form ora doll, a toywery the l'rOWS. A attractive to children can be produced. y 105 Fig. 5 is a broken section of a structure corre- Preferably the standards 5-5 and the guide- .SDOnding to Fig. 1,`- showing a di'erent body ways 4-4 and the casing 6 are made of sheet supported bythe reciprocating magnet, and Fig. metal which can be readily struck up at a min- 6 is a modication. imum cost.

`5v5 Referring to the gures of the drawing, in Referring now to Fig. 5, the construction is V110 identical with that of Fig. 4, except that in this case the body 3' takes the form of a girl sup- 3' will be caused to dance up and down.

Referring to Figs. 3 and 4, the casing 6, the disk 7, the magnet supported thereby, and the shaft 9 and crank 10 are identical withrthe construction shown in Fig. 1. Mounted `upon the casing 6 is a body in the form of a cradle 11, arranged to rock on the top of the casing 6, upon which casing are guide rails 12--12 to con trol the position of the cradle. Supported between the two end walls of the cradle 11 are two magnets 1' and 1".

Referring now to Fig. 4, when the magnet 8 is in the position shown in dotted lines to the left, and the disk 7 is being revolved clockwise,

as indicated by the arrow, and with the like poles of the magnets 1' and 8 opposite each other, the result will be that as soon as the magnet 8 is brought into the magnetic field of the magnet 1', the latter will be repelled, causing the cradle to rock to the right in Fig. 4, and assume the right hand dotted position shown in said figure. This will move the magnet 1" down into the position shown in dotted lines in Fig. 4, and as the magnet 8, under the continued revolutions of the disk 7, passes immediately under said magnet 1", the latter will be repelled and the cradle rocked into the position shown by the dotted lines on the left hand side of said figure. With a plurality of magnets 8 another magnet 8 will immediately pass under the magnet 1', and the operation will be repeated. Manifestly, instead of four magnets there could be one, two or three, or in fact there could be but one.

It will be perceived that in the two constructions shown in Figs. 1 to 4, both the reciprocal magnet and the magnet operating in conjunction therewith are concealed, and there is nothing exposed to the view of the observer that indicates what it is that produces the 'movements of the body 3 or the cradle 11.

The construction in Fig. 6 is a modification of that shown in Figs. 1 and 2. Instead of having a series of magnets supported on a revolving disk as in Figs. l and 2, a plurality of magnets 8', 8 are mounted Aon rods 7', 7 Within the casing 8, the rods being free to slide through openings in the wall of the casing to the end that magnets 8', 8 may be advanced under the magnet 1 and within themagnetic field thereof, as shown in full lines in Fig. 6, but when withdrawn into the position shown in dotted lines in said figure, they are either entirely out of the magnetic field or are not sufliciently advanced within said field to exercise sufficient repulsion to cause the magnet 1 and its supported body 3 to be elevated into the position shown in full lines in Fig. 6. For the purpose of holding the magnets 8', 8 in withdrawn position, any suitable spring construction may be employed. As here shown, springs 7, 7" are connected one end to the casing 6 and one end to the magnet 8', 8', and when the magnets are advanced by pushing inward on the rods 7', 7', said springs are extended; when pressure is withdrawn from said rods the springs withdraw the magnets 8', 8' into the position shown in dotted lines in Fig. 6.

Various modifications of the invention will readily suggest themselves to one skilled in the art, and such modifications as fall Within the terms of the appended claims are intended to be covered thereby.

What is claimed is:

1. In a device of the character described, the combination of a magnet free to reciprocate, means for guiding saidl magnet in its reciprocation, a second magnet supported approximately parallel with said first magnet, and means a1- ternately moving said second magnet into and out of the magnetic field of said first magnet.

2. In a device of the character described, the combination of a magnet free to reciprocate. means for guiding said magnet in its reciprocation, a second magnet supported approximately parallel with said first magnet, means alternately moving said second magnet into and out of the magnetic field of said first magnet, and means concealing said second magnet from view.

3. In a device of the character described, the combination of a magnet free to reciprocate, means for vertically guiding said magnet in its reciprocation, a second magnet supported approximately parallel with said first magnet, and means alternately moving said second magnet c into and out of the magnetic field of said flrst 1N magnet.

4. In a device of the character described, the combination of a reciprocable body, a magnet concealed in said body, means guiding said body in its recprocations, a second magnet mounted approximately parallel with said first magnet, and means -alternately bringing said second magnet into and out of the magnetic field of said first magnet.

5. The combination of a reciprocable body, a 116 rmagnet concealed in said body, means guiding -tions, a body supported by said magnet, a second 120 magnet supported for movement into and out of the magnetic field of said first magnet, and means for bringing said second magnet into and out of said magnetic field.

7. The combination of a magnet mounted to l reciprocate in a vertical plane, a second magmt mounted substantially parallel to said first mag-- net, and means alternately moving said second magnet into and out of the magnetic field of 1 l, said first magnet, whereby said first magnet is moved in one direction by magnetic action and in the reverse direction by gravity.

8. The combination of a reciprocable magnet, means guiding said magnet in its reciprocations, a plurality of magnets mounted for movement seriallyinto and out ofthe magnetic field of said reciprocable magnet, and means imparting such movement to said plurality of magnets.

9. The combination of a magnet mounted cn a rocking support, a second magnet mounted for movement into and out of the magnetic field of said first named magnet, and means for imparting said movement to said second magnet.

10. The combination of a single reciprocable magnet, with a plurality of reciprocable magnets, means normally holding said plurality of magnets without the magnetic field of said rSt named magnet, and means for advancing 150 c magnets into said magnetic 12. The combination of a, single magnet mounted 'so have free reciprocaton, a plurality of concealed magnets, springs normally holding said concealed magnets without; the magnetic ield of seid first namen magnet, and means; advancing :said plurality 'of magnets inte said magnetic field against the tension of sind spring.,

DONALD L. PRWROSE.

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